Isoetes valida

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Distribution Map: Based on vouchered plant specimens only. View county names by placing the mouse cursor over a particular county.

Species Distribution Map
Family:ISOETACEAE
Species:Isoetes valida (Engelm.) Clute
Common Name:Carolina Quillwort; True Quillwort; Mountain Quillwort
Habitat:**
Associated Ecological Communities:**
Growth Habit:Herb
Duration:Perennial
Category:Vascular
USDA Symbol:**
Plant Notes:Carolina Quillwort is a native perennial in the Quillwort family (Isoetaceae). It occurs at scattered locations throughout most of Alabama, and is probably the most common Quillwort in the state. Carolina Quillwort occurs in mud or in shallow water along streams, around ponds, in beaver ponds, and in roadside ditches. It is a perennial from a globose, corky, 2-lobed subterranean corm. The corm produces white, spongy roots from the base and sides, and leaves from the upper portions. The leaves are spirally arranged, hollow, spongy, linear, glabrous, and yellowish green to dark green in color. The bases of the leaves below soil level are white. Carolina Quillwort reproduces by forming spores. The spores are in sporangia located at the bases of the leaves. The sporangia are ¾’s covered by a flap of tissue known as the velum. The plants produce two types of spores. The megaspores are larger, white in color, and have walls that are cristate to reticulate with broken ridges. The microspores are smaller, tan to light brown in color, with spinulose walls. For positive identification, mature spores are needed. This species has been called Isoëtes caroliniana (A. A. Eaton) Luebke, and Isoëtes engelmannii A. Braun var. caroliniana A. A. Eaton.--A. Diamond
Taxonomic Notes:**
Status:Native, S? (State Rank), G4 (Global Rank)
References:**
Specimen: View specimen details in the Alabama Herbarium Consortium Specimen Database

** Not applicable or data not available.

Classification

FamilyISOETACEAE - Quillwort family
Genus Isoetes
Species Isoetes valida (Engelm.) Clute - Carolina Quillwort; True Quillwort; Mountain Quillwort

Citation

Citation Isoetes valida (Engelmann) Clute, Fern Allies 236. 1905.
Basionym: Isoetes engelmannii var. valida Engelm. 1867.
Type: **

** Not applicable or data not available.

Synonyms

SynonymFull CitationBasionymType
Isoetes caroliniana    
Isoetes engelmannii var. caroliniana    

Specimens and Distribution

This species has been reported in the following counties by the herbaria listed. An overview of the individual specimens are provided in the table that follows. Click on the accession number to view details; click on column headers to sort; choose a county or herbaria to filter the specimen data.

Counties included on distribution map: Autauga, Bibb, Chambers, Cherokee, Clarke, Conecuh, DeKalb, Jackson, Lee, Pike, St. Clair

Counties represented by specimen data listed below:

Herbaria represented by specimen data listed below: ALNHS, AMAL, AUA, JSU, TROY, UNA, UWAL

Range of years during which specimens were collected: 1976 - 1976

Barcode / Accession No. County Coll. Date Collector &
Collection No.		 Herbarium &
Herbarium Name Used		 Image
AUA_ACC_31833 Conecuh 16 Sep 1976 Short, John W.
822		 AUA
Isöetes Valida (Engelm.) Clute
AUA_ACC_44911 Conecuh 12 Dec 1986 Diamond, Alvin R.
2960		 AUA
Isöetes Valida (Engelm.) Clute
ALNHS00002674 Clarke 10 Jun 2014 Horne, Howard E.
SWS-285		 ALNHS
Isoetes valida (Engelm.) Clute
TROY000030715 Conecuh 12 May 1977 Short, John W. (Jack)
894		 TROY
Isoetes valida (Engelmann) Clute
JSU108412 DeKalb 15 May 1996 Whetstone, R. David
17521		 JSU
Isoetes valida (Engelmann) Clute
AUA_ACC_44910 Conecuh 22 Dec 1986 Diamond, Alvin R.
2972		 AUA
Isöetes Valida (Engelm.) Clute
AUA_ACC_42026 Conecuh 17 Mar 1986 Diamond, Alvin R.
2126		 AUA
Isöetes Valida (Engelm.) Clute
TROY000042214 Clarke 28 Aug 2009 Keener, Brian R.
5612		 TROY
Isoetes valida (Engelmann) Clute
AUA_ACC_44927 Lee 23 Nov 1986 Diamond, Alvin R.
 AUA
Isöetes Valida (Engelm.) Clute
ALNHS00001784 Conecuh 07 May 2013 Barger, T. Wayne
SP#930		 ALNHS
Isoetes valida (Engelm.) Clute
UNA00026342 Conecuh 16 Sep 1976 Short, John W. (Jack)
822		 UNA
Isoetes valida (Engelm.) Clute
UNA00054565 St. Clair 05 Jun 2001 Keener, Brian R.
1967		 UNA
Isoetes valida (Engelm.) Clute
AUA_ACC_31832 Conecuh 12 May 1977 Short, John W.
894		 AUA
Isöetes Valida (Engelm.) Clute
TROY000030543 Pike 01 Apr 1995 unknown
s.n.		 TROY
Isoetes valida (Engelmann) Clute
ALNHS00003123 Pike 6 Apr 2015 Barger, T. Wayne
SP#1611		 ALNHS
Isoetes valida (Engelm.) Clute
TROY000031873 Pike 24 Feb 2010 Diamond, Alvin R.
21151		 TROY
Isoetes valida (Engelmann) Clute
AUA_ACC_44909 Conecuh 30 Nov 1986 Diamond, Alvin R.
2956		 AUA
Isöetes Valida (Engelm.) Clute
UNA00057827 Pike 03 Mar 1988 Diamond, Alvin R.
4138		 UNA
Isoetes valida (Engelm.) Clute
AUA_ACC_71701 Clarke 28 Aug 2009 Keener, Brian R.
5612		 AUA
Isöetes Valida (Engelm.) Clute
ALNHS00002900 Jackson 2 Jul 2014 Barger, T. Wayne
HC-582		 ALNHS
Isoetes valida (Engelm.) Clute
AUA_ACC_38051 Chambers 2 May 1981 Short, John W.
1233		 AUA
Isöetes Valida (Engelm.) Clute
TROY000000222 Pike 13 Apr 2001 Diamond, Alvin R.
12364		 TROY
Isoetes valida (Engelmann) Clute
TROY000030717 Conecuh 16 Sep 1976 Short, John W. (Jack)
822		 TROY
Isoetes valida (Engelmann) Clute
AMAL00019913 Chambers 02 May 1981 Short, John W. (Jack)
1233		 AMAL
Isoetes valida (G. Engelmann) W. Clute
AUA_ACC_48522 Pike 3 Mar 1988 Diamond, Alvin R.
4138		 AUA
Isöetes Valida (Engelm.) Clute
TROY000048843 Autauga 14 Feb 2017 Parker, Matthew R.
347		 TROY
Isoetes valida (Engelmann) Clute
UWAL0053078 Cherokee 18 Mar 2020 Thompson, Joey
1109		 UWAL
Isoetes valida (Engelm.) Clute
TROY000029642 Pike 26 Oct 2009 Diamond, Alvin R.
21100		 TROY
Isoetes valida (Engelmann) Clute
ALNHS00004883 Conecuh 19 May 2015 Barger, T. Wayne
SP#3022		 ALNHS
Isoetes valida (Engelm.) Clute
ALNHS00002187 Bibb 26 Jun 2013 Barger, T. Wayne
SP#1076		 ALNHS
Isoetes valida (Engelm.) Clute
TROY000032026 Pike 29 Mar 2010 Diamond, Alvin R.
21216		 TROY
Isoetes valida (Engelmann) Clute
AUA_ACC_42034 Conecuh 23 Mar 1986 Diamond, Alvin R.
2198		 AUA
Isöetes Valida (Engelm.) Clute
JSU108411 DeKalb 03 Aug 1986 Whetstone, R. David
15377		 JSU
Isoetes valida (Engelmann) Clute
UWAL0003071 Clarke 28 Aug 2009 Keener, Brian R.
5612		 UWAL
Isoetes valida (Engelm.) Clute
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